A grouping of two or more different types of electrical/electronic components mounted on a common mounting. It may include an assembly of electrical/electronic components mounted on multiple PRINTED WIRING BOARD(S) mounted back to back, stacked, and the like. The item is generally a component of a subassembly and cannot be assigned a more definite item name. Excludes items which may be identified as a subassembly. For an assembly of electrical/electronic components mounted on a single PRINTED WIRING BOARD, see CIRCUIT CARD ASSEEMBLY. Do not use if a more specific name applies."